Sorry but, no, it is not possible to put an ATP auto slide on an ATP frame. There is a firing selector in the ATP auto that works with a full auto sear in the frame of the ATP Auto, (something not in the regular ATP's frame) so putting an ATP slide on an ATP auto frame or vice versa will not be able to shoot full auto.

Not sure... so basically you are saying have an ATP frame, ATP Auto slide, and buy a full auto sear... I'm not sure if you can find the space in the ATP's frame to put the sear in, but if you spent money acquiring an ATP Auto slide, why wouldn't you have the frame as well...?